I'm trying to setup the Micro-PC dongle to use it with MixW or HRD DM780's.

My initial thinking was to use Virtual Audio Cable from Eugene Muzychenko that should work fine.

And it does partially: fine Rx but no Tx and this is because something goes wrong on the setup and I don't know why.

Here's what I do:

I create 2 virtual cables in VACIn the RRC setup I choose VAC1 as speaker and VAC2 as microphone

This causes the following error message related to VAC2:

RRC MICRO: EXCEPTIONCouldn't open sound device Virtual Cable 2(and, well, a large message with a "GetVolumeControl failed" among other strange texts)

If I change the microphone to Microbit then it works fine but for sure I've got my Tx signal in the dongle microphoneand I don't want that. I don't want a physical cable doing a loop back to the computer soundcard. I rather would liketo have a VAC2 injecting that signal by software to the dongle.

On the other side, VAC1 works fine with superb reception results and no physical cables: for sure I could do also thaton the Tx side, couldn't I?

I understand the RRC micro as a device that connects to the remote RRC and that "translates" the digital signal it gets fromthere to an analog signal on the dongle. That signal is identified (to me) as "Microbit 1274A".

From the way I understand this, if I want that signal "injected" to MixW or DM780 then I've got two possibilities.

The first one would be making physical cables from the dongle to the computer soundcard (and this I don't like).

The second one would be creating these Virtual Audio Cables that "digitally repeat" what they hear on the dongle output and send to the treatment program you want (MixW/DM780). A second virtual cable would take the signal generated from DM780 and send it to the dongle input (mic) and from there through the internet to the remote site.

Maybe I'm confused on the way it really works but, but...

i. The Virtual Cable 1 (VAC1) it works fine for me (but not VAC2).ii. If I try to use Microbit 1274A in both speaker and mic (this is the USB audio that the dongle generates) then I don't have any result. Just zero. No signal.

In any of the digital mode software you can select a sound card to use for speakerand audio input. Just select the USB sound card that the Microbit dongle generates.

You must adjust the Windows audio settings for this sound card and not only on thePC Client software. This may be why this wasn't working for you before.

This is actually the easiest way to get digital modes working over RemoteRig, betterthan the RRC. However, Microbit has not yet implemented a virtual COM port for FSKas they have for the RRC, so this method needs to still use AFSK.

I use DM780, and for input (RX audio) it only allows you to select Microbit Microphone, not Speaker. The Microbit SPEAKER is the one that is carrying the received audio from the radio isn't it? Same thing with output (TX audio from DM780), it only offers Microbit Speaker, and the transmitted audio I would think needs to go to Microbit Microphone to get to the radio.

In DM780, it lists Microbit 1274A Microphone, Line, and Speaker separately. That is where I see the problem. On Input (to DM780) they do not offer the 1274A SPEAKER, only Mic or Line. And vice-versa on Output (it only offers 1274A SPEAKER, not mic).

I think it would require an additional item in the driver, to select the Microbit speaker as a RECORDING device, maybe naming it Microbit 1274A PSK RX, and to select the Microbit Microphone as a PLAYBACK device, maybe naming it Microbit 1274A PSK TX.

I don't know how you have it working. For now, I guess I'll make up some short cables.